IdRelay is a Swedish platform for organisations that need to communicate with customers, members, or other audiences. Developed and owned by Interdo AB, it brings email newsletters, SMS, and app notifications together in one tool, with features for creating content, managing recipient lists, scheduling messages, and tracking opens and clicks. Users can personalise communications, run A/B tests, automate sends, and use AI assistance to draft, shorten, or translate text.

The platform also supports surveys, including feedback and NPS collection, and event communications such as invitations, registrations, reminders, and follow-up surveys. IdRelay offers integrations with systems such as CRM, PIM, DAM, CMS, and SSO, helping organisations connect existing data and content to their communications. Its server environment is located in Sweden, and the service includes personal support by phone and email. Organisations can control user access through groups, folders, and permissions, and adapt templates to their brand identity. IdRelay serves businesses, public authorities, and other organisations, and offers demonstrations to help prospective customers assess the platform and plan setup.